Bug 279256

Application: systemsettings (1.0)
KDE Platform Version: 4.7.00 (4.7.0)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-10-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:
When switching between the two backends I noticed sometimes system settings crashes. Doesn't happen every time, but is quite easy to reproduce.

The crash can be reproduced some of the time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4d5d441780 (LWP 5003))]

Thread 2 (Thread 0x7f4d481eb700 (LWP 5004)):
#0  0x00007f4d5a981f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4d586fe104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4d586fe639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4d5b0c9446 in QEventDispatcherGlib::processEvents (this=0xc30b00, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f4d5b09d882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4d5b09dabc in QEventLoop::exec (this=0x7f4d481eadd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f4d5afb4924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007f4d5b07fc2f in QInotifyFileSystemWatcherEngine::run (this=0xc2fe10) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f4d5afb7175 in QThreadPrivate::start (arg=0xc2fe10) at thread/qthread_unix.cpp:320
#9  0x00007f4d58bc9d8c in start_thread (arg=0x7f4d481eb700) at pthread_create.c:304
#10 0x00007f4d5a98f04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4d5d441780 (LWP 5003)):
[KCrash Handler]
#6  0x0000000001021c80 in ?? ()
#7  0x00007f4d3fddc64a in LibVLC::vlcUnload (this=0xd56bb0) at /build/buildd/phonon-backend-vlc-0.4.0/vlc/libvlc.cpp:262
#8  0x00007f4d3fddc675 in LibVLC::~LibVLC (this=0xd56bb0, __in_chrg=<value optimized out>) at /build/buildd/phonon-backend-vlc-0.4.0/vlc/libvlc.cpp:44
#9  0x00007f4d3fdd1e88 in Phonon::VLC::Backend::~Backend (this=0x1266490, __in_chrg=<value optimized out>) at /build/buildd/phonon-backend-vlc-0.4.0/vlc/backend.cpp:125
#10 0x00007f4d3fdd1f09 in Phonon::VLC::Backend::~Backend (this=0x1266490, __in_chrg=<value optimized out>) at /build/buildd/phonon-backend-vlc-0.4.0/vlc/backend.cpp:133
#11 0x00007f4d4d10abbf in Phonon::FactoryPrivate::phononBackendChanged (this=0xcb0310) at ../../phonon/factory.cpp:308
#12 0x00007f4d4d10af62 in Phonon::FactoryPrivate::qt_metacall (this=0xcb0310, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff66ea9fd0) at ./factory.moc:77
#13 0x00007f4d5b3f39fa in QDBusConnectionPrivate::deliverCall (this=0x843380, object=0xcb0310, msg=..., metaTypes=..., slotIdx=8) at qdbusintegrator.cpp:942
#14 0x00007f4d5b3fde4f in QDBusCallDeliveryEvent::placeMetaCall (this=<value optimized out>, object=<value optimized out>) at qdbusintegrator_p.h:103
#15 0x00007f4d5b0b249a in QObject::event (this=0xcb0310, e=<value optimized out>) at kernel/qobject.cpp:1226
#16 0x00007f4d5bccf9f4 in QApplicationPrivate::notify_helper (this=0x84f330, receiver=0xcb0310, e=0x1269060) at kernel/qapplication.cpp:4462
#17 0x00007f4d5bcd43ba in QApplication::notify (this=<value optimized out>, receiver=0xcb0310, e=0x1269060) at kernel/qapplication.cpp:4341
#18 0x00007f4d5c9df796 in KApplication::notify (this=0x7fff66eaaa20, receiver=0xcb0310, event=0x1269060) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007f4d5b09e49c in QCoreApplication::notifyInternal (this=0x7fff66eaaa20, receiver=0xcb0310, event=0x1269060) at kernel/qcoreapplication.cpp:731
#20 0x00007f4d5b0a1c25 in sendEvent (receiver=0x0, event_type=0, data=0x7fb890) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#21 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x7fb890) at kernel/qcoreapplication.cpp:1372
#22 0x00007f4d5b0c9253 in sendPostedEvents (s=0x851dc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#23 postEventSourceDispatch (s=0x851dc0) at kernel/qeventdispatcher_glib.cpp:277
#24 0x00007f4d586fdbcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f4d586fe3a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f4d586fe639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f4d5b0c93ef in QEventDispatcherGlib::processEvents (this=0x7fb490, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#28 0x00007f4d5bd794de in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f4d5b09d882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f4d5b09dabc in QEventLoop::exec (this=0x7fff66eaa9b0, flags=...) at kernel/qeventloop.cpp:201
#31 0x00007f4d5b0a1ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#32 0x0000000000410f36 in main (argc=5, argv=<value optimized out>) at ../../../systemsettings/app/main.cpp:49

Reported using DrKonqi